Chapter 21
Roof Plan Layout
2
Links for Chapter 21
Lines and Symbols
Materials
Drawing Roof Plans
3
Lines and Symbols• Roof Shape - Steeper
pitch means a smaller overhang– Use a solid, bold line for
changes in roof shape– Lines representing walls
are thin and dashed
RIDGE
4
Lines and Symbols• Hip is a line that is
drawn to represent the exterior intersection between two roof planes
• An interior corner is called a valley
RIDGE
45
45
5
Lines and Symbols• A Dutch hip roof is
drawn with a gable wall– Typically 48” to 72”
from exterior wall– Partial sections may
need to be drawn if roof is complicated
RIDGE B
RIDGE A
6
Lines and Symbols• Bay windows require
special consideration– Square walls of the
bay– Lay out ridge line– Extend lines for roof
overhangSTEP 1 STEP 2 STEP 3
7
Materials• Structural
material is represented with a thin line showing the proper direction and span
1
RAFTER SIZES MAY BESPECIFIED ON THE PLANOR IN A SCHEDULE
12x6 RAFT
@ 24"O.C. STD ROOF TRUSSES@ 24" O.C. - SEEDRAW BY MANUF.
1 2x6 RAFTERS@ 24" O.C.
8
Materials• Nonstructural
material (vents, skylights, chimneys, and downspouts) are locally noted
SOLAR PANELS
U.L. APP'D METAL CHIMNEYCANT STRIP
SKYLITE
RIDGE VENTS
DOWNSPOUT
CHIMNEY
9
Materials• Chimney
– Metal ones are represented with a 14” circle– Masonry ones are 16” square
• Skylight– Connected to the ceiling with a chase or well– Allow extra light into rooms
10
Materials• Gutters and Downspouts
– Used to remove water from rain off the roof– Diverters are used if there is not a lot of rainfall
during the year– Represented with a 3” square or circle– “H” is for the high side and “L” is for the low
side of the gutter
11
Dimensions• Very few
dimensions are required
• Only overhangs and openings are dimensioned
13'-0" 28'-0" 19'-0"TYP.24"
13'-0"
TYP.24"
12
Drawing Roof Plans• Draw perimeter walls and supports• Draw overhang limits
– 1’-0” for gable end walls– 2’-0” for eaves
• Draw ridges, hips, and valleys• Insert nonstructural materials
13
Drawing Roof Plans• Add dimensions for overhangs and skylights• Label all materials using local and general
notes, title, and scale• Check the drawing for completeness and
quality
14
Drawing Roof Plans
2'-0"TYP.
19'-0"
1'-0"TYP.
6'-0"
DOMED PLASTIC24" X 24" DBL.
ROOF PLAN1/8" 1'-0"
SKYLITE
- PROVIDE SCREENED ROOF VENTS @ 10'-0" O.C. (1/300 VENT TO ATTIC SPACE ).
- USE 300 # COMPOSITION SHINGLES OVE- USE 1/2" CCX PLY @ ALL EXPOSED EAV
15 # FELT.
GENERAL NOTES:
JOIST SPACE @ ALL ATTIC EAVES.
PLUMBING CONT.INSTALLED BYSUPPLIED BY OWNERSOLAR PANELS
3- 24" X 76"
- PROVIDE SCREENED VENTS @ EA. 3RD.
W/ 26 GA. METALFLASHING
CHIMNEY. FLASHLINE OF MASONRY
12"Ø SCREENEDRIDGE VENTS
DOMED PLASTIC24" X 36" DBL.
OPENABLE
TYPICAL DOWNSPOUT
SKYLITE
15
Drawing Hip Roof Plans
SUPPLIED BY OWNER
SKYLITE
DOMED 24" X 24" DBL.
PLUMBING CONT. INSTALLED BY
SOLAR PANELS 3- 24" X 76"
FLASHING W/ 26 GA. METAL CHIMNEY. FLASH LINE OF MASONRY
- USE 300 # COMPOSITION SHINGLES OV
- USE 1/2" CCX PLY @ ALL EXPOSED EAVES
- PROVIDE SCREENED ROOF VENTS @
- PROVIDE SCREENED VENTS @ EA. 3RD.
10'-0" O.C.
15 # FELT.
GENERAL NOTES:
JOIST SPACE @ ALL ATTIC EAVES.
RIDGE VENTS 12 SCREENED
TYPICAL DOWNSPOUT
24" X 36" DBL. DOMED PLASTIC OPENABLE
TYP.
2'-0"
19'-0" 6'-0"
TYP. 2'-0"
ROOF PLAN 1/8" 1'-0"
PLASTIC
SKYLITE
16
Drawing Dutch Hip Roof Plans
TYP.2'-0"
19'-0" 6'-0"
2'-0"TYP. 1'-0"
TYP.
6'-0"TYP.
SKYLITE DOMED PLASTIC24" X 24" DBL.
FLASHINGW/ 26 GA. METALCHIMNEY. FLASHLINE OF MASONRY
24" X 36" DBL.DOMED PLASTICOPENABLE
ROOF PLAN1/8" 1'-0"
SKYLITE
TYPICAL DOWNSPOUT
SUPPLIED BY OWNER PLUMBING CONT. INSTALLED BY
SOLAR PANELS 3- 24" X 76"
- USE 300 # COMPOSITION SHINGLES OV
- USE 1/2" CCX PLY @ ALL EXPOSED EAVES
- PROVIDE SCREENED ROOF VENTS @
- PROVIDE SCREENED VENTS @ EA. 3RD.
10'-0" O.C.
15 # FELT.
GENERAL NOTES:
JOIST SPACE @ ALL ATTIC EAVES.
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